Let \(L\)  be a non-cyclic group with a unique complemented abelian minimal normal
subgroup \(N\) . Assume also that \(N\)  is complemented in \(L\) . As in
[1]}, let \(L^k\) 
be the direct product of \(k\)  copies of \(L\)  and set
\(L_k=\lbrace (l_1,\dots , l_k)\in L^k\mid l_1\equiv \dots \equiv l_k\pmod {N}\rbrace .\) 
